EMM19star NOVEL ZEOLITIC IMIDAZOLATE FRAMEWORK MATERIAL, METHODS FOR MAKING SAME, AND USES THEREOF
AssigneeExxonMobil Research and Engineering Company
InventorsSimon Christopher Weston, Mobae Afeworki, Zheng Ni, John Zengel, David Lawrence Stern
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Abstract
A method is provided for forming a zeolitic imidazolate framework composition using at least one reactant that is relatively insoluble in the reaction medium. Also provided herein is a material made according to the method, designated either as EMM-19 or as EMM-19*, and a method of using same to adsorb and/or separate gases, such as carbon dioxide.
Claims32
A zeolitic imidazolate framework composition with the SOD framework type, wherein the zeolitic imidazolate framework structure is capable of sorbing, at a temperature of ˜28° C.:
- (i) at least 0.60 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜75 Torr;
- (ii) at least 0.75 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜100 Torr;
- (iii) at least 1.15 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜200 Torr;
- and/or (iv) at least 0.35 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜39 Torr.
A zeolitic imidazolate framework composition having the empirical formula, Zn(5-azabenzimidazolate)2, wherein the zeolitic imidazolate framework structure is capable of sorbing, at a temperature of ˜28° C.:
- (i) at least 0.60 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜75 Torr;
- (ii) at least 0.75 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜100 Torr:
- (iii) at least 1.15 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜200 Torr;
- and/or (iv) at least 0.35 mmol of CO2 per gram of zeolitic imidazole framework composition at a CO2 partial pressure of ˜39 Torr.
A porous crystalline material having the empirical formula Zn(5-aza-benzimidazolate)2, exhibiting an SOD framework type, and exhibiting an x-ray diffraction pattern with peaks defined by the d-spacing ranges and relative intensity ranges described in Table 1b.
A porous crystalline material having the empirical formula Zn(5-aza-benzimidazolate)2, exhibiting an SOD framework type, and exhibiting an x-ray diffraction pattern with peaks defined by the d-spacing ranges and relative intensity ranges described in Table 1d.
A porous crystalline material having the empirical formula Zn(5-aza-benzimidazolate)2, exhibiting an SOD framework type, and exhibiting an x-ray diffraction pattern with peaks defined by the d-spacing ranges and relative intensity ranges described in Table 7b.
A porous crystalline material having the empirical formula Zn(5-aza-benzimidazolate)2, exhibiting an SOD framework type, and exhibiting an x-ray diffraction pattern with peaks defined by the d-spacing ranges and relative intensity ranges described in Table 8b.
A porous crystalline material having the empirical formula Zn(5-aza-benzimidazolate)2, exhibiting an SOD framework type, and exhibiting an x-ray diffraction pattern with peaks defined by the d-spacing ranges and relative intensity ranges described in Table 9b.
A method for forming a zeolitic imidazolate framework composition, said method comprising the steps of:
- (a) mixing together a reaction medium, a source of a imidazolate or a substituted imidazolate reactant, IM, and a reactant source of metals M1 and M2 to form a synthesis mixture, wherein M1 and M2 comprise the same or different metal cations, at least one of which reactants is relatively insoluble in the reaction medium itself and in the synthesis mixture;
- (b) maintaining the synthesis mixture having at least one relatively insoluble reactant under conditions sufficient to form a zeolitic imidazolate framework composition having a tetrahedral framework comprising a general structure, M1-IM-M2;
- and (c) treating the zeolitic imidazolate framework composition under conditions sufficient to stably reduce its unit cell volume.
Dependencies are inferred from the claim text.